5066-4090 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.090 inch bore Pin Dia.: 0.99" Comp Height: 1.39" Piston Series Option:FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs 433 Small Block Oldsmobile

433 Small Block Oldsmobile

more than that and it would have been more cost effective and better to replace the whole set

392 Chevy LS

326 Chevy LS

Approx Comp Ratio: 58cc-8

5066-4090 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.090 inch bore Pin Dia.: 0.99" Comp Height: 1.39" Piston Series Option:FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs 433 Small Block Oldsmobile434 FE Ford, FX, Comp Height: 1. 39, 24cc Dish Top, PIN: . 99", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 4. 125", ROD: 6. 7, Approx Comp Ratio: 65cc 10. 1, 72cc 9. 5, 76cc 9. 18 NOTE: Most FEseries OEM connecting rods require narrowing at the pin end to achieve proper side clearance within the 2. 5inch pin boss. Aftermarket rods are typic Thesey manufactured with a narrower profile and therefore do not require this modification.